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Wyświetlanie 1-3 z 3
Tytuł:
Metoda standaryzacji kosztów jednostkowych ścinki i wyrobu sortymentów
Method of standardizing of unit costs of felling and production of wood assortments
Autorzy:
Kocel, J.
Powiązania:
https://bibliotekanauki.pl/articles/978876.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
standard costs
felling and production of wood assortments
grouping method for forest districts
financial
system of the state forests
Opis:
The paper presents the standardization of felling and production of assortments costs by the method of grouping forest districts with similar natural conditions. The standard costs were compared with the incurred (actual) and planned costs, and the method of determining the standard unit costs of felling and production of assortments was assessed in terms of its use in the State Forests National Forest Holding financial system. Source materials for 2017 were obtained from the databases of the State Forests Information System for all forest districts and used to develop standard unit costs. The method of costs standardization determined 12 uniform groups of forest districts in terms of the structure of harvested timber assortments and the share of dominant tree species in the total area of forest districts. Then for each group 5% of outlying values were excluded based on mean and standard deviation. Next, average value for such truncated number of cases was calculated and defined as the standard costs. Pearson linear correlation was used to examine the relationship between actual, planned and standard unit costs. We found significant relationship between the investigated types of costs. The significant relationship was found also among weighted averages of actual, planned and standard unit costs calculated for regional directorates of the State Forests. No significant differences was observed between average unit costs not reflected in the financial practice of the State Forests. Slight differences in analysed costs constitute significant cost values on the scale of the whole company as felling and production of assortments consists of many tasks. The presented method of forest districts grouping should be used to standardize unit costs of felling and assortments production, which would be helpful in financial planning at the various levels of the management in the State Forests. Values omitted in the presented method require additional analyzes. Separate assessment is also required for the factors (justified or unreasonable) causing deviations in forest districts obtaining actual costs departing from the costs of other forest districts included in the same assortment and species group.
Źródło:
Sylwan; 2020, 164, 09; 736-746
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pozyskanie drewna w nadleśnictwach Puszczy Białowieskiej w latach 2008-2015
Harvest of timber in forest districts of the Bialowieza Forest in 2008-2015
Autorzy:
Zastocki, D.
Lachowicz, H.
Sadowski, J.
Moskalik, T.
Nietupska, M.
Powiązania:
https://bibliotekanauki.pl/articles/985925.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Puszcza Bialowieska
gospodarka lesna
nadlesnictwa
pozyskiwanie drewna
sortymenty drewna
lata 2008-2015
białowieża forest
cutting categories
assortments
nature−valuable areas
Opis:
The paper presents a multifaceted structure of timber harvest in 2008−2015 in the Białowieża, Browsk and Hajnówka forest districts located in the Białowieża Forest. The object of the research, including the Białowieża National Park being a remnant of the primeval forests, is considered one of the most valuable forest areas of natural origin in Europe. The studies were made on the basis of the data from the reports created by the State Forests Information System and forest management plans, as well as the nature conservation programs of the surveyed forest districts. In the analysed period, a total of 665,032.5 m3 of merchantable timber was harvested in the analysed area. The highest volume of merchantable timber was harvested in the Browsk Forest District – 305,934 m3 (46%), then in the Hajnówka Forest District – 219,300 m3 (33%), with the lowest volume harvested in the Białowieża Forest District 139,788 m3 (21%). Among the individual assortment groups, the medium−sized timber was the most common and its harvested volume amounted to 413,579 m3, while the harvested volume of large−sized timber amounted to 251,454 m3. The lowest harvested volume concerned the small−sized timber and amounted to 21,652 m3. In the analysed period, softwood had the largest share in timber harvest and amounted to 443,469 m3. Hardwood was obtained in the volume of 243,215 m3. According to the cutting category, the timber harvest structure was as follows: the highest volume was harvested in pre− commercial thinning 382,495 m3 (54%), that from incidental felling amounted to 251,003 m3 (38%), while the lowest volume of harvested timber was from final cutting – 53,186 m3 (8%). Forest districts located in the Białowieża Forest encounter many difficulties affecting timber harvest. The main reason for this lies in the numerous restrictions imposed on the management of areas covered by various forms of nature protection, including the exclusion of some habitats, or stands of 100 years of age and older from management, which significantly affects the yield. The lack of a determined rotation age for stands in the Białowieża Forest also has a significant impact on timber harvest.
Źródło:
Sylwan; 2018, 162, 11; 941-948
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ceny sprzedaży drewna w użytkowaniu przedrębnym w drzewostanach sosnowych w zależności od ich wieku
Prices of timber sales in the intermediate harvest in Scots pine stands depending on their age
Autorzy:
Mandziuk, A.
Parzych, S.
Powiązania:
https://bibliotekanauki.pl/articles/979471.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
drzewostany sosnowe
wiek drzewostanu
uzytkowanie przedrebne
surowce drzewne
drewno
sortymenty drewna
ceny sprzedazy
site class index
timber price
assortments
intermediate harvest
Opis:
The research concerned the implementation of tasks in the field of harvesting timber in 2008−2012 in pure pine stands aged 10−140. Numerical data from the SILP database were used for calculating the average price of timber in the intermediate harvest. The data on the volume harvested covered late cleaning, early thinning and late thinning. The assortment structure concerned the following groups of large− (WA0, WA1, WB0, WB1, WC0, WC1 and WD), medium− (S10, S11, S2A, S2B, S3A, S3B and S4) as well as small−sized (M1 and M2) assortment groups. The data on the size and value of wood assortments sold across the country concerned the year 2011 and were used to calculate the average price of wood in age subclasses according to the site quality described with site index class. Subsequently, for each site quality class polynomial equations of the trend line was determined and average timber price for each age subclass was calculated for small−, medium− and large−sized assortments. The analysis showed that S2 is the most frequently harvested assortment in the intermediate cuts in Scots pine stands, whose share depending on the site quality class is at the level of 65.7−72.7% of total harvest. The share of small−sized assortments decreases with age in all site quality classes. The opposite tendency is seen for large−sized assortments, whose share decreases with the deterioration of the site quality. Fraction of medium−sized assortments reaches its peak at the age of ca 45 in IA site index class and the shift in the peak with age is associated with the deterioration of the site quality. The higher the site quality, the higher the prices of assortments in the intermediate harvest. This trend occurs in all age subclasses.
Źródło:
Sylwan; 2019, 163, 11; 883-891
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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